The Performance Characteristic Of A Rod Wire Parallel Hole Collimator For Gamma Camera

Looi, Hong Ming (2019) The Performance Characteristic Of A Rod Wire Parallel Hole Collimator For Gamma Camera. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) The performance characteristic of a rod wire parallel hole collimator for gamma camera.pdf - Submitted Version Download (347kB)

Abstract

Gamma camera or gamma detector is a device to capture the image of gamma radiation emitting radioisotopes. The gamma camera is the imaging technique used to carry out functional scan of the organ in the patient’s body such as brain, thyroid, lungs, liver and others to detect the abnormal cells like a tumour or cancer. It contains of four main part, which is collimator, scintillator, photomultiplier and computer. The collimator will be the target of this project where it acts as a filter of the gamma camera. The problem with the collimator is its weight and difficult to handle. In this project is to propose the design of the rod collimator made from a series of tungsten wire with lighter weight and have a comparable performance compare to the standard parallel hole collimator. Since gamma camera involves nuclear energy radiation, preliminary work on designing the component of the device must be using simulation tools rather than real experimentation as it is involving a nuclear radiation. A low energy general purpose rod collimator was designed and simulated using MCNP5 software. Hole size, septa thickness and collimator thickness are the parameters that are needed to consider for designing of the collimator. The simulation results was then processed by MATLAB software for the image processing step. In this project, a software called MCNP5 was used to construct the gamma camera and the rod wire collimator to run the simulation using a low energy point source. The output PTRAC file was processed by the Matlab software to generate the image and improve the image quality. The results given by the rod wire collimator is surprisingly well in which its weight reduce by 72.9% from 42kg to 11.4kg with comparable performance in term of resolution. Since the weight is reduced with comparable resolution, this collimator can be applied in the portable gamma camera

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